Why are these so tight!?

Description: My boyfriend always says how "fat" i made him so i decided to try on a few pairs of his shorts. needless to say, it didn't go well at all. i then try to wiggle my way into 2 pairs of jeans that barely fit, i'm not sure what happened, i could wear them last year hehe guess it's really the other way around. being a stay at home milf is good for your figure